-In "Text Mode", it displays the output of a program, or the contents
-of a file or URL, as configured on the "Advanced" tab of the main
-Screensaver Preferences window.
-
-In "Slideshow Mode", it chooses a number of images from the image
-source you configured into XScreenSaver and displays them within the
-limitations of the Apple ][ display hardware. (Six available colors
-in hi-res mode!)
-